Wrench



July 11, 1933. J CAMERQN 1,917,293

WRENCH Filed May 7. 1932 2 Sheets-Sheet 1 I I II Inventor H5622 7'. Cameron July 11, I j R ON WRENCH Filed May 7. 1952 2 Sheets-Sheet 2 Inventor H5572 7 6472mm flllorney Patented July 11, 1933 JOHN F. cAMERo'N, or SEATTLE, wnsnineron WRENCH Application filed May 7,

The present invention relates to a wrench of the slidable inner j aw type and has for its primary object to provide, in a manner as hereinafter set forth, a wrench of this character embodying novel construction combination and arrangement of parts, through the medium of which adjustments of the inner j aw may be accomplished expeditiously and V with a minimum of'efiort.

Other objects of the invention are to provide a wrench of the character described which will be simple in construction, strong, durable, efficient and reliable in use, compact,

and which may be manufactured at low cost.

All of the foregoing-and still further objects and advantages of the invention will become apparent from a study of the iollowmg specification, taken in connection with j the accompanying drawings, wherein like characters of reference designate corresponding parts throughout the several views, and wherein. 1

Figure 1 is a view in side elevation of a wrench constructed in accordance with the present invention.

Fig. 2 is a view in Vertical 1 the wrench.

Fig. 3 is a View in front elevation of the wrench.

section through the inner aw.

7 Referring now to the drawings in detail, it will be seen that the embodiment of the invention which has been illustrated, comprises a shank 1 having inner end portions formed to provide a handle 2. V the outer end of the shank 1 is a substantially right angular extension toothed stationary outer jaw 3. On its inner side and'extending from the outer aw 3 substantially to the handle 1, the shank 1 is provided with a recess 1 in which is mounted a rack bar 5.

The rack bar 5 is secured in positionby suitable elements 6 which will permit the removal and replacement of the rack bar when the same becomes worn.

Mounted for sliding and rocking move1 Fig. 4 is a detail view in side elevation of Integral with 1932. Serial No. 609,930.

vided with a longitudinal slot 9 at an intermediate point. Yokes 10 and 11 are rigidly secured to the slidable jaw 7 and slidably receive the shank 1 for mounting said jaw 7 thereon. The yoke 11 is of a length to maintain the lower end portion of the extension 8 comparatively close to the ratchet bar 5, while theyoke 10 is comparatively long to permit I I rocking movement of the jaw 7.

A dog 12 is pivotally mounted, as at 13, in the'slot 9 for opposite engagement with the ratchet bar 5 while releasablysecuring the slidable inner jaw 7 in adjusted position. The tail 1 1 of the dog 12 projects over the upper portion of the extension 8. The dog 12 is yieldingly urged into engagement with the ratchet bar 5 by a coil-spring 15 having one end'e'ngaged with'the tail 14L and its other end engaged in a socket 16 provided therefor in the extension 8. v j

In use, when it is desired to adjust the aw' 7 towards the stationary jaw 8, it is only necessary to exert pressure in the proper direction. The dog 12 will ride over the teeth of the'ratchet bar 5 to permitadjustment in this direction. l/Vhen it is desired to adjust the jaw 7 away fromthe stationary jaw 3, this may be conveniently accomplished by engaging the index finger with the b ight portion of the yoke 10 and actuating the dog 12 by exerting pressure on the tail 14 with the thumb to disengage said dog 12 from the ratchet bar 5 against the tension of the coiled spring 15. Of course, when the dog 12 is disengaged from the ratchet bar 1 5, the inner jaw 7 is-free to be'shifted. Should the dog 12 become worn, or the coil spring 15 weak, these elements may be conveniently removed and replaced-with new ones. The jaw 7 and extension 8 are provided with a longitudinal groove or channel 17 in which the ratchet bar 5 is engaged. I This is illustrated to advantage in Figs. 1 and 2 of the drawings.

The construction and arrangement herein a llustrated andv described 1s such that, when a thewrench is applied to the work and pres sure exerted on the handle 2 in one direction, the inner jaw 7 will be rocked from the position shown in Figs. 1 and 2 of the drawings inwardly with the obvious result that the m0 work will be tightly gripped between the jaws. When thus rocked, the jaw 7 fulcrums or pivots on the dog 12.

It is believed that the many advantages of a wrench constructed in accordance with the present invention will be readily understood, and although the preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the details of construction, and in the combination and arrangement of parts, may be resorted to, which will fall within the scope of the invention as claimed.

Having thus described my invention, what I claim as new is a A wrench comprising a shank, a handle on one end of the shank, a substantially right angularlv extending stationary jaw on the other end of the shank, said shank having a a recess in one side thereof, extending longitudlnally therein, a ratchet bar secured in the ratchet bar, the edges of the groove constituting guides abutting the sides of the ratchet bar to prevent transverse motion of the jaw, yokes carried by-the inner jaw and the extension slidably engaging the shankfor mounting the inner jaw thereon and a spring pressed pawl pivotally carried by the extension and cooperatingwith the ratchet bar for releasably securing the inner jaw in adjusted position. 7 V

In testimony whereof I aflix my signature.

JOHN F. AMERON. 

